Literally: this day.
Use díí jį́ to refer to today. Like previous words, you can break díí jį́ into two other Navajo words.
Namely, díí means this, or these. Further, jį́ means day.
Díí jį́ éiyá Monday.
[note: éiyá and its shorter version éí are phonetic filler words; they’re almost like respected ‘ums’ and ‘uhhs’.]